 # 需求1: 在字符串 加前缀,后缀
str_list=["aaa","bbb","ccc"]
new_str_list = [f"preifx__{str_val}__suffix" for str_val in str_list]
print("new_str_list: ",new_str_list) 

""" 结果
ew_str_list:  ['preifx__aaa__suffix', 'preifx__bbb__suffix', 'preifx__ccc__suffix']
"""